I tend to get the stuff packs for little other reason than the fact that I don't have them. I don't spent a whole lot of time worrying about what's actually in them until I actually get them. It usually ends up that the things I thought looked like they might be cool aren't all that great in practice, and I discover things that I didn't even know were in them that turn out to be cooler than the idea of the original items that I thought would appeal to me. For me, there is no such thing as having too much variety.
However, the biggest difference between you and I is that I play Sims on a desktop and you play it on a laptop, so I understand your need for hard drive conservation. I don't think they had laptops in mind when they originally designed it...and due to the intricacy of the program itself, I'm guessing they probably couldn't consider laptops without severely limiting themselves. Laptops are more concerned with portability than functionality, and have to make sacrifices in the latter in order to improve the former. Desktops are the opposite: they forgo portability altogether for maximum functionality. That doesn't make one better or worse by virtue of being what they are: better or worse is determined exclusively by the user's needs. I have no need for portability, so I don't use laptops.
As for which one: if you want hot tubs without having to install Late Night, OLS would probably appeal to you more than TL. However, if you have Late Night, there probably won't be enough new content in OLS for you to warrant using up the extra hard drive space. You would likely be better off disregarding stuff packs altogether, and saving your money for the next actual expansion pack (or buying one you don't already have).
